Telescopic wrench



w. 1. PARSONS.

TELESCOPIC WRENCH.

' APPLICATION FILED DEC.8. 1921.

1,417,683,. Patented May 30,1922

Has.

INVENTOR I 97W UNITED STATES QF w eI WILLIAM 3'. reasons, OFMONTAGUE MASSACHUSETTS, Assrenon'ro I I FALLS COMPANY, or MILLERS rams, MASSACHUSETTS, A; ooRPoR'A'frIon 0 21.;

MASSACHUSETTS.

To'all whom it may concern: I

. Be it known that I, WILLIAM J. PARSONS,- a citizen of the-United States; residing at Montague, in the county of Franklin'and State of Massachusetts, have invented new and useful Improvements in Telescopic Wrenches, of which the following is'a specification. v I f This invention has for its chiefobje'ct to provide a wrench whereby a jack-screw locatedmore or less inaccessib'ly under a motor vehicle, may be operated by a'person standing beside the vehicle, and to provide a strong, simple and'du'rable wrench structure adapted to'be folded in compact form for storage in a tool-box, and to be quickly and convenientlyextend'ed and adapted for use. Of the accompanying drawings forming a part of this specification,- r

Figure'l is a side elevation,' showing a wrench embodyingf'rny invention engaged with amember-of a-jack-screw, a portion of the wrench being broken away.

"Figure 1 is a side elevation of the portion not shown by Figure 1.

Figure 2 is aside viewshowingthewrench folded. 3 i

Figure 3 shows the wrench on a larger scale, and a portion of a j ack-screw. the inner member of the wrench and a portion of the outermember being shown in section.

Figure 4-is a section on line4-4 of Fig ure 3.

Figure 5 isa' seotionon'line 5 5 of Fig ure'3.' f 9 I I Figure Sis a section on line 6- 6 of Figure3. j

The same reference characters indicate the same parts in all of the figures. 4

' The wrench includes an elongated tubular inner member 12, havingapolygonal wrench r socket 13, at one "end, preferably of hex agonal form, andladapted to receive and rotate a hexagonal member' l l, projecting from a jackscrew, the'm'ember l l being an element of mechanism which raises and lowers the screw-threaded member 15 of the jack screw when the member 14; is rotated-in a bearing :16. Thesocket 13 is formed in an inner collar or sleeve 13% which isinternally threaded and s'crewedon to the inner end ofthe member 12, the latter being'preferablya length of tubing The outer end of the member 12'h'as' a polygonal bore portion 17, preferably hexagonal; and formed in an outer TE L EsoorIc wnnnorr."

collar or sleeve 17% whichlnis tinternallyi threadedland screwed onto the Jmemjberl1-2, the bore portion-l7 'beinglia' somewhat-fire duced extension of the bore ofsaid member; Each 'of the sleeveslB -and' 17 has an en; larged bore portion receiving *an end of the tube 12," and a' polygonal bore.:portion-of smaller diameter, projecting from the tube,'; as shown by Figure 3. w 5

The wrench also includes anwelongated' outer member '19, composed of a solid'rod c v Specification of Letters Patent L Application filed December a, 1921'. Srial'No; 5 2O ,8 9 4'.f v

of polygonal and preferably hexagonal cross" 1 section, having a sliding fit 'in the bore por t1on 17, andthusslidably engaged with'theg inner, member 12, to longitudinally extend plete zone of its polygonal perimeter in con-y tact with "the polygonal [bore portion 17, it

' followsthat a strong, 'durable,.fand=simple connection is provided whereby: the outer Y member is'adapted to rotate-the inner mem her, without liability "of breaking either of 1 the members of the connection;=' :1 a

'1 The wrench is'adapt ed for use' byeXtend ing it longitudinally tothe limit permittedbya stop enlargement-19 formedwonflone '70 i and contract the-wrench." Theouter mem T by the polygonal formwo'f thebore portion a i i 17, to rotatethe innerime'mberfi Theaouterend of the member 19.'and"abutting against i the inner end of the bore portion 17s Thewrench when applied to the jack member 14;:

is interlocked with saidfmemberQ and tits 901 .1 interlocked'with each other to': 'prevent ac cidental longitudinal"contraction"of; the! members 12 and-19 are 'at thesame time wrench; by 'two spring-pressed .deten'tsv21 I and 22," at opposite end-'portions5tlofthe? wrench member 12. The'detent 21-is;adapt'- ed normally to engage anannuIar shoulder; 23; formed a by" one fledge of a peripheral groove in the jack member 14;" Ilhe detent 22is adapted-normally 'toengageja shoulder 24; formedby oneendjof a recess"in:the outerwrench member 19. Said detents are manu-z ally displaceable, and each includes -a l'onger i and ashorter arm: and. a connecting-neck,

the shorter arm constituting thelacting-pon" tion of the detent, as shown by Fi'gure's'et. and 5. The longer arm of the detent 21' slides in a guide 25, in'one' side of the'center of the sleeve 13, and projects fromfisaidj guide so that it mayreceive.displacing 'pres sure fronisthe operatorvsifinger. The-longer arm of the detent 22 slides in a guide 26, in one side of the sleeve 17 and is also adapted to receive displacing pressure from a finger. Each detent is controlled by a spring 27.

The stop enlargement 19 is freely movable in the tube 12, and is adapted to enter the inner end of the tube before the inner sleeve 13" is applied; When the inner sleeve is ap plied, the stop enlargement is confined against withdrawal from either end of the inner member formed by. the tube 12 and the sleeves 13 and 17 Provision is therefore made for conveniently assembling the inner and outer members, and limiting the movement of the outer member in each direction.

The outer end of the outer member 19 is provided with a transverse socket 28,- preferably formed in a sleeve or collar 29, attached, as by a pin 30, to the member 19. 31 represents a handle-bar adapted to slide endwise in said socket, and occupy an operative position presenting two grip portions projecting from opposite sides of the member 19, as shown by Figures 1" and 8, and to be moved to an inoperative position at one side of the member 19. The handle-bar is provided with means permitting it to be folded beside the wrench,

as shown by Figure 2, without being disconnected from the member 19. To this end I preferably provide one .end of the handle-bar with a reduced and curved extension 32, adapted to slide loosely in the socket 28, and permit the described folding of the bar. The extension is provided with a stop enlargement 33, adapted to abut against one side of the collar 29, and prevent the withdrawal of the extension from the socket 28. i

The handle-bar 31 is provided centrally with a peripheral groove having a bevelled end '34 and a flat end 35. In a socket in the outer wrench member 19. is a detent 36, which is pressed by a spring 37 into said groove, and normally confines the handle-bar in its operative position. Thebevelled'end 34 causes the detent to yield when thehandle-bar is forcedendwise toward its inoperative'position. The fiat end 35 is so formed that the bar cannot be: moved 'endwisein the opposite direction. The handle-bar is therefore adapted to be conveniently disengaged from the detent, and displaced in one direction and folded, and isnot displaceable'in the opposite direction tion.-

I claim: 1; A telescopic wrench comprising an from its operative posielongated-inner member composed of a tube,

and .an innerand an outer sleeve, each'sleevehaving an enlarged bore portion receiving an end of'the'tube, and a polygonal bore portion of smaller diameter projecting from the sleeve, the polygonal bore portionof the inner" sleeve constituting a wrenchsocket,

mimosa sleeve to'longitudinally extend and contract the wrench, the outer member being provided at its inner end with a stop enlargement,

movable freely in thetube portion of the inner member, and adapted to abut against a shoulder on the said outer sleeve, to limit the elongation of the wrench, said stop -enlargem'ent being insertible in the tube portion of the 'inner'member before the application of the inner sleeve, and prevented from withdrawal from said tube portion when the inner sleeve is applied. 1 I 1 2. A telescopic wrench substantially as; specified by claim 1, the sleeves of the said inner member'being provided with springpressed detents, one adapted normally to en gage a part engaged by the said wrenoh socket, and the other to engage the outer member when the wrench is extended, so that, when the wrench is in use, its socket is interlocked with said part, and the outer member is interlocked with the inner member, each of said detents including a longer and a shorter arm, and a 'connectingneck, the "shorter arm constituting the acting portion of the detent, andthelongerarm being movable in a guide atone side of the Ion-- gitudinal center of the sleeve by which it is carried, and projecting from said sleeve to receive displacing pressure, the arrange-c mcnt bein'gsuch that inward pressure on the projecting portion of the longer arm" outwardly displaces the shorte r arm. 3. A telescopic wrench comprising an inner member having a wrench socket; and an outer member slidably engaged with the inner member,- to longitudinallyextend and contract the wrench, said members being in-. I

operative position presenting hand-grip q portions projecting in opposite directions from the outer member, and'to an inoperative position wholly at one side of the outer member, one end of the handle-bar being provided With'me'ans permitting the folding of the 'bar beside the wrench ;when the' bar is moved to its inoperative position.

4. A telescopic wrench comprising an in-. ner member having a wrench socket; and an outer member slidably engaged with the inner member, 'tolongitudinally extend and contract the wrench, said-members being in member by 'the outenmember, 'the outer member b eingprov-ided with va transverse socket in its outer end ,portiongl and? alien-,-

terengaged to cause rotationi'of the inner dle-bar slidable endwise in said socket to an operative position presenting hand-grip portions projecting in opposite directions from the outer member, and to an inoperative position wholly at one side of the outer extension from the socket.

5. A telescopic wrench comprising an'inner member having a wrench socket; and an outer member slidably engaged with the inner member, to longitudinally extend and contract the Wrench, said members being interengaged to cause rotation of the inner member by the outer member, the outer member being provided with a transverse socket in its outer end portion; a handleen:- largement preventing the withdrawal of the bar slidable iendwise in said socket ,an operative position presenting hand-grip portions projecting in opposite directions from the outer member and to an inoperative position wholly at one side of the outer member, one end of the handle-bar being i provided with means permitting the folding of the bar beside the wrench when the bar is moved to its inoperative position, the said handle-bar being provided-centrally with a peripheral groove, one end of which is: bevelled; and a sprlng-pressed detentnornia-lly projecting into said socket and formed 35' to engage the ends of said groove and confine the handle-bar in its operative position,

said detent being displaced by the'said,

bevelled end when the bar is moved toward its inoperative position. i

In testimony whereof I have afiixed my signature.

WILLIAM J. PARSONS. I 

